我正在尝试删除python 2.7并将其替换为python 3.6.我想要做的主要是键入“python”,我的终端使用python 3.6,但由于某种原因,我被限制升级python.
我安装了python 3：
brew install python3
以下是我正在运行的命令.有人请帮帮我吗？
Guys-MacBook-Pro:bin guy$python --version
Python 2.7.10
Guys-MacBook-Pro:bin guy$python3 --version
Python 3.6.5
Guys-MacBook-Pro:bin guy$whereis python
/usr/bin/python
Guys-MacBook-Pro:bin guy$whereis python3
Guys-MacBook-Pro:bin guy$pwd
/usr/bin
Guys-MacBook-Pro:bin guy$ls -l | grep python
-rwxr-xr-x 1 root wheel 66880 Mar 27 23:03 python
-rwxr-xr-x 4 root wheel 925 Oct 7 2017 python-config
lrwxr-xr-x 1 root wheel 75 Apr 2 15:56 python2.7 -> ../../System/Library/Frameworks/Python.framework/Versions/2.7/bin/python2.7
lrwxr-xr-x 1 root wheel 82 Apr 2 15:56 python2.7-config -> ../../System/Library/Frameworks/Python.framework/Versions/2.7/bin/python2.7-config
-rwxr-xr-x 1 root wheel 66880 Mar 27 23:03 pythonw
lrwxr-xr-x 1 root wheel 76 Apr 2 15:56 pythonw2.7 -> ../../System/Library/Frameworks/Python.framework/Versions/2.7/bin/pythonw2.7
Guys-MacBook-Pro:bin guy$ls -l /usr/local/bin|grep python
lrwxr-xr-x 1 guy admin 43 Apr 16 15:25 easy_install-3.6 -> ../Cellar/python/3.6.5/bin/easy_install-3.6
lrwxr-xr-x 1 guy admin 31 Apr 16 15:25 pip3 -> ../Cellar/python/3.6.5/bin/pip3
lrwxr-xr-x 1 guy admin 33 Apr 16 15:25 pip3.6 -> ../Cellar/python/3.6.5/bin/pip3.6
lrwxr-xr-x 1 root wheel 69 Apr 16 12:42 python3 -> ../../../Library/Frameworks/Python.framework/Versions/3.6/bin/python3
lrwxr-xr-x 1 root wheel 76 Apr 16 12:42 python3-config -> ../../../Library/Frameworks/Python.framework/Versions/3.6/bin/python3-config
lrwxr-xr-x 1 root wheel 71 Apr 16 12:42 python3.6 -> ../../../Library/Frameworks/Python.framework/Versions/3.6/bin/python3.6
lrwxr-xr-x 1 root wheel 78 Apr 16 12:42 python3.6-config -> ../../../Library/Frameworks/Python.framework/Versions/3.6/bin/python3.6-config
lrwxr-xr-x 1 root wheel 72 Apr 16 12:42 python3.6m -> ../../../Library/Frameworks/Python.framework/Versions/3.6/bin/python3.6m
lrwxr-xr-x 1 root wheel 79 Apr 16 12:42 python3.6m-config -> ../../../Library/Frameworks/Python.framework/Versions/3.6/bin/python3.6m-config
lrwxr-xr-x 1 guy admin 33 Apr 16 15:25 wheel3 -> ../Cellar/python/3.6.5/bin/wheel3
Guys-MacBook-Pro:bin guy$sudo ln -s /Library/Frameworks/Python.framework/Versions/3.6/bin/python3 python
ln: python: Operation not permitted
Guys-MacBook-Pro:bin guy$sudo su
sh-3.2# pwd
/usr/bin
sh-3.2# ln -s /Library/Frameworks/Python.framework/Versions/3.6/bin/python3 python
ln: python: Operation not permitted
sh-3.2# exit
exit
Guys-MacBook-Pro:bin guy$sudo su -
Guys-MacBook-Pro:~ root# cd /usr/bin
Guys-MacBook-Pro:bin root# ln -s /Library/Frameworks/Python.framework/Versions/3.6/bin/python3 python
ln: python: Operation not permitted
Guys-MacBook-Pro:bin root#
解决方法:
您不需要运行brew install python3来安装Python 3.x,因为公式python现在是defaults到Python 3.x.简单地运行：
brew安装python
安装Python 3.x.
Homebrew安装的Python二进制文件仍然命名为python3,因此运行python将默认为Apple Python,它仍然是Python 2.x.要解决它,通过运行以下命令python to python3：
别名python =“python3”
它应该做的伎俩.您可能希望通过运行以下命令来删除Homebrew安装的python3公式：
brew卸载python3
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